參數(shù)資料
型號: PEF2445N
英文描述: ?Multipoint Switching and Conferencing Unit - Attenuation?
中文描述: ?多點(diǎn)交換和會議股-衰減?
文件頁數(shù): 29/73頁
文件大?。?/td> 1618K
代理商: PEF2445N
PEB 2466
PEF 2466
Operational Description
Hardware Reference Manual
20
2001-02-20
4.2.10
Harmonic and Intermodulation Distortion
Table 14
Harmonic and Intermodulation Distortion
4.2.11
Total Distortion
Table 15
Signal-to-Total Distortion Ratio Measured with Sine Wave
Figure 9
Total Distortion Measured with Sine-Wave, Receive and Transmit
Parameter
Symbol
Limit Values
min.
typ.
50
Unit
Test Conditions
max.
44
Harmonic Distortion
2
nd
, 3
rd
order
Intermodulation
HD
dB
0 dBm0;
f
= 1014 Hz
R
2
R
3
IMD
IMD
46
56
dB
dB
Equal-level, 4-tone method
(EIA-464) at composite
level of -13 dBm0;
f
= 300 Hz to 3400 Hz
Input Level Symbol
Min. Values
A-Law
24.5
29.5
35.5
36.4
Unit
Test Conditions
μ-Law
27
31
35.5
36.4
-45 dB
-40 dB
-30 dB
> -28 dB
S/D
S/D
S/D
S/D
dB
dB
dB
dB
sine wave f=1014 Hz, receive and
transmit,
μ-Law:
C-message weighted,
A-Law:
psophometrically weighted.
-60
0
Input Level
10
20
30
27
40
-50
-40
-30
-20
-10
0
dBm0
dB
24.5
-45
-28
35.5
31
29.5
A-Law
-Law
μ
36.4
S
2466_210
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